DUFRENITE
Specimen duf-3

Dims: 1.3 x 1.0 x 0.7" (3.4 x 2.5 x 1.7 cm)

Wt: 16 g

Iron Knob, South Australia, Australia

This thumbnail piece consists mostly of botryoidal Dufrenite. The material has either a deep brown or a pale rusty-brown coloration depending on its level of oxidation, and its luster likewise ranges from silky to dull and earthy according to oxidation. Though no triclinic crystals are evident, it does show its classic botryoidal formation and some integral layering. There does not appear to be any base or host material present.

Dims: 1.0x0.9x0.7" (2.5x2.4x1.8cm)

Wt: 0.55 oz. (15.7g)

Penikla, Czech Republic

This specimen contains a thin layer of radiating dufrenite crystals on a host rock. The dufrenite has oxidized to a rich brown color, with an earthy luster. The host rock contains several different minerals, including more dufrenite and some goethite.

Dims: 1.0x0.9x0.7" (2.5x2.4x1.8mm)

Wt: 0.20 oz. (5.7g)

Penikla, Czeckoslovakia

This is a chunk of massive dufrenite, showing no crystal form. One surface is lighter in color, showing the proper brown color of freshly oxidized dufrenite. The remaining surfaces are much darker in color, likely due to coatings of other minerals.